ILines (CustomNPC-Plus 1.11.1 API)

```
public interface ILines
```
A collection of dialog lines, supporting creation, indexed access, and random retrieval.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`clear()`	Removes all lines.
`ILine`	`createLine(String text)`	Creates and adds a new line with the given text.
`Integer[]`	`getKeys()`
`ILine`	`getLine(boolean isRandom)`	Returns a line, either randomly or sequentially.
`ILine`	`getLine(int lineIndex)`	Returns the line at the given index.
`boolean`	`isEmpty()`
`void`	`removeLine(int lineIndex)`	Removes the line at the given index.
`void`	`setLine(int lineIndex, ILine line)`	Sets the line at the given index.

- Method Detail
  - createLine
```
ILine createLine(String text)
```
    Creates and adds a new line with the given text.
    
    Parameters:
    
    text - the line text.
    
    Returns:
    
    the created line.
  - getLine
```
ILine getLine(boolean isRandom)
```
    Returns a line, either randomly or sequentially.
    
    Parameters:
    
    isRandom - true to return a random line; false for sequential.
    
    Returns:
    
    the selected line, or null if empty.
  - getLine
```
ILine getLine(int lineIndex)
```
    Returns the line at the given index.
    
    Parameters:
    
    lineIndex - the line index.
    
    Returns:
    
    the line, or null if the index is invalid.
  - setLine
```
void setLine(int lineIndex,
             ILine line)
```
    Sets the line at the given index.
    
    Parameters:
    
    lineIndex - the line index.
    
    line - the line to set.
  - removeLine
```
void removeLine(int lineIndex)
```
    Removes the line at the given index.
    
    Parameters:
    
    lineIndex - the line index.
  - clear
```
void clear()
```
    Removes all lines.
  - isEmpty
```
boolean isEmpty()
```
    Returns:
    
    true if there are no lines.
  - getKeys
```
Integer[] getKeys()
```
    Returns:
    
    the indices of all stored lines.