Considering the default editability of the buffer, and tags that
affect editability, determines whether text inserted at iter would
be editable. If text inserted at iter would be editable then the
user should be allowed to insert text at iter.
TextBuffer.insertInteractive uses this function to decide
whether insertions are allowed at a given position.
Considering the default editability of the buffer, and tags that affect editability, determines whether text inserted at iter would be editable. If text inserted at iter would be editable then the user should be allowed to insert text at iter. TextBuffer.insertInteractive uses this function to decide whether insertions are allowed at a given position.